Li-ion microbatteries generated by a laser direct-write method

A laser-based direct-write process is demonstrated as a method to fabricate Li-ion microbatteries. The battery electrodes are made by the laser-induced forward transfer of inks of charge-storage materials (composites of carbon/binder and LiCoO 2/carbon/binder) onto micromachined metal-foil current c...

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Bibliographic Details
Published inJournal of power sources Vol. 126; no. 1; pp. 193 - 202
Main Authors Wartena, Ryan, Curtright, Aimee E, Arnold, Craig B, Piqué, Alberto, Swider-Lyons, Karen E
Format Journal Article
LanguageEnglish
Published Lausanne Elsevier B.V 16.02.2004
Elsevier Sequoia
Subjects
Applied sciences
Battery
Direct energy conversion and energy accumulation
Direct-write
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Exact sciences and technology
Laser
Li-ion
Microbattery
Microbattery
Li-ion
Direct-write
Battery
Laser
Lithium battery
Charge storage
Manufacturing process
Micromachine
Lithium ion
Composite material
Thin film
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Summary:A laser-based direct-write process is demonstrated as a method to fabricate Li-ion microbatteries. The battery electrodes are made by the laser-induced forward transfer of inks of charge-storage materials (composites of carbon/binder and LiCoO 2/carbon/binder) onto micromachined metal-foil current collectors to form 40–60 μm thick electrodes with 16 mm 2 (4 mm×4 mm) footprints. Both half cells and packaged microbatteries display capacities of approximately 155 μAh or 100 mAh/g, as normalized to the amount of LiCoO 2, and are comparable to the capacities of control electrodes that have been stenciled and pressed. The electrode capacities are not compromised when they are assembled into microbatteries, packaged and tested in air. The density and volumetric capacity of the laser-transferred electrodes are lower than those reported for sputtered thin-film microbatteries, yet the former electrodes can be made thicker and therefore deliver the same amount of charge from a smaller footprint. The data indicate that this laser direct-write method may be a viable approach for developing Li-ion microbattery systems for autonomous microelectronic devices and microsensors.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2003.08.019